Refrigeration line size calculator



FIG. 1 is a front elevational view of a refrigeration line size calculator showing my new design;

FIG. 2 is a right side elevational view, the left side being the same;

FIG. 3 is a top plan view, the bottom being the same; and

FIG. 4 is a rear elevational view thereof. 

The ornamental design for a refrigeration line size calculator, substantially as shown and described. 